CTU learns from the rescue of Hassan that terrorists have a plan to acquire nuclear rods from the Russian mob. With the help of Renee Walker, Jack forces the cooperation of Sergei Bazhaev's mob family. The nuclear rods are given to Samir Mehran, who plans to make a dirty bomb on American soil. Hassan's head of security, Tarin Faroush is revealed to be a part of Mehran's group and they present an ultimatum to Taylor's government - she must hand over Hassan for execution or the bomb will be detonated.